Patents by Inventor Hisashi OTANI

Hisashi OTANI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11077508
    Abstract: A gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus continuously performs cutting work for a first tooth flank and cutting work for a second tooth flank during a single feed operation, and changes a correction angle between the cutting work for the first tooth flank and the cutting work for the second tooth flank.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: August 3, 2021
    Assignee: JTEKT Corporation
    Inventors: Hiroyuki Nakano, Hisashi Otani, Shuntaro Takasu
  • Patent number: 11059115
    Abstract: A gear machining apparatus creates a gear on a workpiece W by moving a gear cutting tool relatively with respect to the workpiece along the direction of the rotation axis of the workpiece W while synchronously rotating the gear cutting tool and the workpiece. One of a workpiece rotation speed controlling portion and a tool rotation speed controlling portion varies the rotation speed of one of the workpiece and the gear cutting tool and the other one of the workpiece rotation speed controlling portion and the tool rotation speed controlling portion synchronizes the rotation speed of the other one of the workpiece and the gear cutting tool with one of the rotation speed of the workpiece and the gear cutting tool.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: July 13, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Daichi Kanda, Takaaki Hashimoto, Yuji Sasaki, Yoshihiko Yamada, Hisashi Otani, Yoshitaro Ohsaki
  • Patent number: 11033974
    Abstract: A gear machining apparatus and a gear machining method are provided. The gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus sets a correction angle to a first angle when cutting work for a second tooth flank is started after cutting work for a first tooth flank is finished, and moves the gear cutter from a first finish position to a second start position while rotating the workpiece and the gear cutter.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: June 15, 2021
    Assignee: JTEKT Corporation
    Inventors: Hiroyuki Nakano, Hisashi Otani, Shuntaro Takasu
  • Publication number: 20210053130
    Abstract: A tooth groove machining method includes: defining a shift angle as a phase correction angle in skiving when shifting a reference point of a predetermined tooth groove of a workpiece in a circumferential direction of the workpiece; machining a first tooth side surface by the skiving with a gear cutting tool, by setting an intersection angle to a predetermined intersection angle, and by setting the phase correction angle to a first phase correction angle; and machining a second tooth side surface by the skiving with the same gear cutting tool as the gear cutting tool that machined the first tooth side surface, by setting the intersection angle to be the same with the predetermined intersection angle, and by setting the phase correction angle to a second phase correction angle different from the first phase correction angle.
    Type: Application
    Filed: August 20, 2020
    Publication date: February 25, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Lin Zhang, Hisashi Otani, Hiroyuki Nakano
  • Publication number: 20200398398
    Abstract: An abnormality detection apparatus for working tools configured to be used in a machining process performed by a machine tool, the abnormality detection apparatus includes a storage portion which previously stores correlations between features of a plurality of operating portions relation to the machining process performed by the machine tool, and a tool condition of each of a plurality of working tool types, and a tool condition determining portion which determines the tool condition of the working tools based on the correlations.
    Type: Application
    Filed: June 4, 2020
    Publication date: December 24, 2020
    Applicant: JTEKT CORPORATION
    Inventors: Shuntaro TAKASU, Yuki ISHIGURE, Hisashi OTANI, Toshihiro YONEZU
  • Publication number: 20200171610
    Abstract: A tool unit includes a rotary tool, a first holder which is connected to a first end portion of the rotary tool in an axial direction of the rotary tool, a second holder connected to a second end portion of the rotary tool in the axial direction of the rotary tool, and a third holder having a first support surface rotatably supports an outer circumferential surface of the first holder at a side of the first end portion of the rotary tool and a second support surface rotatably supports an outer circumferential surface of the second holder at a side of the second end portion of the rotary tool, the third holder being connected to the spindle housing so as not to be relatively rotatable to the spindle housing. According to this configuration, displacement of the rotary tool in the radial direction can be restricted effectively by the third unit.
    Type: Application
    Filed: November 27, 2019
    Publication date: June 4, 2020
    Applicant: JTEKT CORPORATION
    Inventors: Hisashi OTANI, Seiji KAKAMI, Hiroyuki NAKANO, Koji TOYAMA, Yuki KONNO
  • Publication number: 20200130120
    Abstract: A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Applicant: JTEKT Corporation
    Inventors: Kazuki NATSUDA, Kento TAKEUCHI, Hisashi OTANI, Hiroyuki NAKANO
  • Patent number: 10618125
    Abstract: To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: April 14, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Kazuki Natsuda, Hisashi Otani, Hiroyuki Nakano, Yoshimitsu Okada
  • Publication number: 20200086409
    Abstract: A gear machining apparatus and a gear machining method are provided. The gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus sets a correction angle to a first angle when cutting work for a second tooth flank is started after cutting work for a first tooth flank is finished, and moves the gear cutter from a first finish position to a second start position while rotating the workpiece and the gear cutter.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 19, 2020
    Applicant: JTEKT Corporation
    Inventors: Hiroyuki NAKANO, Hisashi OTANI, Shuntaro TAKASU
  • Publication number: 20200086408
    Abstract: A gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus continuously performs cutting work for a first tooth flank and cutting work for a second tooth flank during a single feed operation, and changes a correction angle between the cutting work for the first tooth flank and the cutting work for the second tooth flank.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 19, 2020
    Applicant: JTEKT Corporation
    Inventors: Hiroyuki NAKANO, Hisashi OTANI, Shuntaro TAKASU
  • Publication number: 20200047268
    Abstract: A gear machining apparatus creates a gear on a workpiece W by moving a gear cutting tool relatively with respect to the workpiece along the direction of the rotation axis of the workpiece W while synchronously rotating the gear cutting tool and the workpiece. One of a workpiece rotation speed controlling portion and a tool rotation speed controlling portion varies the rotation speed of one of the workpiece and the gear cutting tool and the other one of the workpiece rotation speed controlling portion and the tool rotation speed controlling portion synchronizes the rotation speed of the other one of the workpiece and the gear cutting tool with one of the rotation speed of the workpiece and the gear cutting tool.
    Type: Application
    Filed: October 11, 2017
    Publication date: February 13, 2020
    Applicant: JTEKT CORPORATION
    Inventors: Daichi KANDA, Takaaki HASHIMOTO, Yuji SASAKI, Yoshihiko YAMADA, Hisashi OTANI, Yoshitaro OHSAKI
  • Publication number: 20190217406
    Abstract: A gear machining method includes a first intersection angle setting step of setting a first intersection angle with a rotation axis of a workpiece during machining of a second tooth flank, a first rotational direction setting step of setting a rotational direction of the workpiece and a rotational direction of a machining tool during machining of the second tooth flank to a same rotational direction, and a second rotational direction setting step of setting a rotational direction of the workpiece and a rotational direction of the machining tool during machining of a fourth tooth flank to a same rotational direction that is opposite to the rotational direction during machining of the second tooth flank.
    Type: Application
    Filed: January 3, 2019
    Publication date: July 18, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Lin Zhang, Masaki Ichikawa, Hisashi Otani, Hiroyuki Nakano
  • Publication number: 20190024729
    Abstract: To provide a machining device and a machining method that can achieve a reduction in a machining time of grooves of a workpiece including grooves having different torsion angles. A machining device includes a control device configured to use a machining tool having a rotation axis, an intersection angle of which can be changed with respect to a rotation axis of a workpiece, and cut a peripheral surface of the workpiece by feeding the machining tool relatively in a direction of the rotation axis of the workpiece while rotating the machining tool synchronously with the workpiece. The peripheral surface of the workpiece includes at least two grooves having torsion angles different from each other. The control device changes the intersection angle based on the torsion angles to respectively cut the at least two grooves.
    Type: Application
    Filed: July 19, 2018
    Publication date: January 24, 2019
    Applicant: JTEKT CORPORATION
    Inventors: Lin Zhang, Hisashi Otani, Hiroyuki Nakano
  • Publication number: 20180126472
    Abstract: To provide a gear machining device and a gear machining method which achieve machining of tooth flanks having different torsion angles with high degree of accuracy. In a gear machining device, a side surface of a tooth of a gear includes a first tooth flank and a second tooth flank having a different torsion angle from the first tooth flank, a cutting blade of a machining tool has a blade traces having a torsion angle determined based on a torsion angle of the second tooth flank and an intersection angle between a rotation axis of a workpiece and a rotation axis of the machining tool so as to allow the second tooth flank to be machined on the pre-machined first tooth flank.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 10, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Lin Zhang, Hisashi Otani, Hiroyuki Nakano, Kento Takeuchi
  • Patent number: 9919371
    Abstract: A gear machining apparatus includes a machining tool having a plurality of protruding tool edges on an outer periphery of the machining tool, and driving apparatuses that form a tooth on a work piece by rotating the machining tool around a central axis thereof, rotating the work piece W around a central axis thereof, and moving the machining tool relative to the work piece. Radial outer faces of the protruding tool edges form multiple steps that are parallel to the central axis of the machining tool such that the diameter of the machining tool increases in a stepwise manner from a tool leading end toward a tool base end of the machining tool.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: March 20, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Kazuki Natsuda, Hisashi Otani, Hiroyuki Nakano
  • Publication number: 20180001405
    Abstract: To provide a gear cutting tool capable of supplying a coolant liquid to an optimum position even when cutting edges are reground. The gear cutting tool includes the tool body having a plurality of blades on an outer peripheral surface thereof and a center hole, and a nozzle provided in the center hole of the tool body so that a fixed position in the tool body is adjustable. The nozzle includes a flow channel which allows supplied coolant liquid to flow into the center hole of the tool body, and discharge the coolant liquid toward the plurality of blades.
    Type: Application
    Filed: June 23, 2017
    Publication date: January 4, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Kazuki NATSUDA, Hisashi OTANI, Hiroyuki NAKANO, Yoshimitsu OKADA
  • Patent number: 9782847
    Abstract: A gear machining device is provided which can machine an accurate gear by a cutting process by synchronously rotating a machining tool and a workpiece at a high speed. A machining tool includes roughing cutting teeth for roughing bottom lands and right and left side faces of teeth of a gear, right side face finishing cutting teeth for finishing the right side faces of the teeth, and left side face finishing cutting teeth for finishing the left side faces of the teeth. The cutting teeth thus cut different parts of the teeth of the gear. This can reduce cutting resistance and suppress self-vibration during the cutting process, thereby improving tooth trace accuracy of the gear.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: October 10, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hisashi Otani, Hiroyuki Nakano, Hideki Shibata
  • Patent number: 9623502
    Abstract: A gear machining device for machining a gear by using a machining tool which has a rotation axis inclined relative to a rotation axis of a workpiece and feeding the machining tool relatively in the rotation axis direction of the workpiece by rotating the machining tool in synchronization with a rotation of the workpiece. The gear machining device includes a tool state memorizing portion for memorizing a tool state including a position or a posture of the machining tool relative to the workpiece for machining a tooth bottom, first and second side surfaces of the gear and a machining control portion for controlling machining of the workpiece under each tool state of the machining tool memorized in the tool state memorizing portion.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: April 18, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hisashi Otani, Kichiji Takeshita, Hiroyuki Nakano, Lin Zhang
  • Publication number: 20170008103
    Abstract: A gear machining apparatus includes a machining tool having a plurality of protruding tool edges on an outer periphery of the machining tool, and driving apparatuses that form a tooth on a work piece by rotating the machining tool around a central axis thereof, rotating the work piece W around a central axis thereof, and moving the machining tool relative to the work piece. Radial outer faces of the protruding tool edges form multiple steps that are parallel to the central axis of the machining tool such that the diameter of the machining tool increases in a stepwise manner from a tool leading end toward a tool base end of the machining tool.
    Type: Application
    Filed: July 6, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Kazuki NATSUDA, Hisashi Otani, Hiroyuki Nakano
  • Patent number: 9539659
    Abstract: A gear machining apparatus causes a machining tool and a workpiece to rotate at a high speed in synchronization with each other to machine a highly accurate gear through cutting. The machining tool is manufactured such that each of pitches between tool blades of the machining tool is an integer multiple of a pitch between teeth of the gear, the integer multiple being equal to or larger than double. By using the machining tool for cutting performed by the gear machining apparatus, the number of the tool blades of the machining tool, which are brought into contact with the workpiece at the same time, is reduced. Thus, it is possible to suppress occurrence of self-excited vibrations during cutting by reducing the cutting resistance. Thus, it is possible to enhance the tooth trace accuracy of the gear.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: January 10, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hisashi Otani, Hiroyuki Nakano, Hiroaki Goshima